Hello Pochwalona,
After 5 days your plant will Wither.
Anyway u have a "bug", acting like warzone 567 crystals, if u have inside your depot your time will increase a lot.
Finally will wither but maybe in 5/6 months.
Remember, everytime u stand next to a depot, this time will count, that means that u have 5 days inside depot for make this flowers wither.
Greetings Gleemody